Stencil-duplicating apparatus.



S. O. EDMONDS.

STBNUIL DUPLIOATING APPARATUS.

APPLICATION FILED MAY 9, 1905. 1,001 ,827, Patented Aug. 29,1911.

3 BEEETS-BHEET l.

INVENTOR S. 0. EDMONDS.

STENCIL DUPLIOATING APPARATUS.

APPLICATION FILED HAY 9, 180B,

Patented Aug. 29, 1911.

3 SHEETS-SHEET 2.

coumnm rLANuqRArm m WASHINGTON. u,

S. O. EDMONDS.

STENCIL DUPLIGATING APPARATUS.

APILIGATIOH nun llAYB, 1908. 1,001,827, Patented Aug. 29, 1911.

3 BHEETE-BHEET 3.

INVENTOR UNITED STATES PATENT OFFICE.

SAMUEL OWEN EDMONDS, OF NEW YORK, N. Y., ASSIGNOR TO A. B. DICK COMPANY,OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

STENCIL-DUPLICATING APPARATUS.

Specification of Letters Patent.

Patented Aug. 29, 1911.

Application filed May 9, 1908. Serial No. 431,938.

To all whom "it may concern.

Be it known that I, SAMUEL O. EoMoNns, a. citizen of the United States,residing in the city, county, and State of New York, have inventedcertain new and useful Improven'icnts in Stencil-Duplicating Apparatus,(Case 13,) of which the following is a specification.

This invention relates to stencildi.lplicating apparatus elnployii'ig adrum upon the cylindrical surface of which a steneil-sheet is securedand a pressure-roller eo-acting with the drum to imprint. upon a sheetpassed between) it. and the drum.

The invention is directed to the provision of means for supplying theink for printing whereby the operation of replenishing the supply of inkcan be more readily performed and the ink more evenly distributed.

In the preferred embodiment of the invention the ink for printing issupplied through the interstices in the stencil from an inking devicedirectly underlying the same and the ink for this purpose is suppliedfrom an ink receptacle exterior to the drum of the machine. Thestencil-sheet extends around only a portion of the cylindrical surfaceof the drum and the drum is open on the side opposite the stencil; theinking device above referred to is so arranged that it can be turnedfrom a position ui'iderlying the stencil to a position at the open sideof the drum to permit of supplying ink thereto from the receptacleexterior to the drum.

The preferred embodiment of my invention is illustrated in theaccompanying drawings in which Figure 1 is a longitudinal sect-ion of astencil-duplicating machine, Fig. 2 is an end View of the same, Fig. 3is a transverse section of the drum showing a positioirof the partsdifferent from that illustrated in Fig. 1, Fig. 4 is an end View of thedrum broken away in part and Fig. 5 is a detail View hereinafterreferred to.

Referring to these drawings, the machine consists of a base A on whichare mounted side-frames B in which the drum C is mounted for rotation,the drum being provided with trunnions at its ends entering hearings inthe side-frames B. The drum consists of heads 0 connected to 'ether bybars 0* and having a foraminated sheet E secured thereto and extendingaround a substai'itial portion of the cylindrical surface thereof.Secured to one of the heads r: is a gear 0 meshing with a gear c carriedby a stub-shaft. mounted for rotation in a. bear- 111g formed in one ofthe side-frames B and provided with an operating handle o Thestencil-sheet is adapted to overlie the foraminated stencil-carrier Eand. is secured at one end to the drum by buttons 0 and at the other endby means of a bail c pivotally mounted on the heads of the drum (1. Anink-pad c of absorbent textile material is arranged between theforaniinated stencil carrier E and the stencil-sheet, this pad beingsecured to the drum in any suitablemanner as by means of loops formed inthe end thereof and receiving bars extending between the heads of thedrum. h

Directly below the drum is a pressureroller D mounted for rotation inarn'is (I pivotally mounted upon the side-frames B and acted upon by thesprings cl to carry the r oller D to the upward and operative positionin which it. will coactwith the drum to imprint upon a sheet. Roller Dmay be drawn down to an inoperative position by cams (Z coacting withthe ends of the arms (Z and mounted upon a shaft which may be providedwith an operating handle. A combined paper stop and stripper, of wellknown construction, is shown at (Z for arresting a sheet in properposition for printing and for preventing a sheetfrom sticking to thesurface of the drum after it has been imprinted upon.

Ink is supplied to the pad 0 through the openings in the stencil-carrierE by a pad F of absorbent material which is secured in any suitablemanner to the face of a thin metallic plate. Secured to the plate 7' isa crossbar f the ends of which are secured to sector-shaped members 7"each having an arm extending inward radially of the drum. The curve ofthe outer face of each of the sector-shaped arms f is formed on a radiussomewhat less than the radius of the drum C. The pad F and the plate 7correspond in size to the portion of the stencil-carrier which thestencil-sheet. overlies and the plate f is made of spring metal so thatwhen the plate is unrestrained it turns to a position in which itpresses the pad F outwardly into contact with the interior surface ofthe carrier E. The inner end of the radial arm of each of thesect0r-shaped pieces f is pivotally connected to the end of a lever gthe other end of which is secured to a rock-shaft G; the ends of thisshaft are mounted in bearings formed in members y which are adapted toturn loosely on studs cxtcnding inwardly of the drum at the center ofthe heads thereof. On each of the members g is an arm to which isaffixed one end of a spring 9 the other end of this spring being affixedto the lever 9 so that these springs tend to turn the levers g in adirection to carry the sector- -shaped members 7 out wardly against theinner face of the stencilcarrier. On each of the levers g is a stud Z2.extending through a slot in a link It the other end of which ispivotally connected to one arm of a three-armed member 7?. The otherarms of each of the members /z, are connected with the plate f atopposite edges of the latter, by link h. The members 72. are securedupon a rock-shaft h the ends of which are received in bearings formed inthe members g. The member g at the right side of the machine as seen inFig. 2, is afiixed to a gear I and this gear meshes with a gear 2'secured upon a stubshaft 2" mounted for rotation in a bearing formed inone of the heads 0 of the drum. The outer end of stub-shaft z" isprovlded with an operating-handle i on the outer side of the drum head.The shaft it on which the two members h are secured s extended at oneend through an opening in the gear I and has an operating lever Jsecured upon the outer end thereof. This lever is made of spring metaland on themner face thereof is provided with a pro ection or stud jwhich is adapted to enter one or the other of two depressions (F 1g. 4)hold the lever in the position to which 11; 1S moved against the tensionof springs g A locking device is provided for holding the drum C againstrotation when it is desired to supply ink to the pad F. This may be ofany suitable construction. In the drawings I have shown a pin K adaptedto slide in an opening provided in one of the side-frames B, the end ofthis pin being adapted to enter an opening is in the adjacent drum head.

Mounted u on the side-frames B is an ink receptacle L in which a rollerZ is mounted for rotation in such position that a substantial portion ofthe roller is immersed in the ink. A second roller Z is mounted with itssurface in contact with the surface of the roller Z this roller beingcarried by arms Z which are loose upon the shaft of the roller Z. Aspring Z may be provided as shown 1n Fig. 3 for holding the roller Z inthe inoperative position in which it is shown 1n Fig. 1 or in theoperative position in which it is shown in Fig. 3 and in which it isadapted to make contact with the ink-pad F. Fins Z may be arranged uponthe arms Z to limit the extent of turning movement of the roller Z.

The machine is operated in the usual manner to imprint upon sheetspassed between the drum and pressure-roller. Ink is supplied by the pad6 through the interstices of the stencil to the impression sheet, andthe pad 6 receives its supply of ink through the openings in the carrierE from the pad F underlying the carrier. WVhen it becomes necessary toreplenish the supply of ing of the pad F the drum 0 is turned by meansof its operating handles to the position in which the open side thereofis toward the ink receptacle L. In this position the drum 0 is lockedagainst rotation by means of the pin K. The parts are then in theposition shown in Fig. l. The operator then turns the handle J from theposition in which it is shown in dotted lines in Fig. 4 to the positionin which it is shown in full lines, thus rocking the shaft it and themembers 7& secured thereto. As the members k turn thus they act throughlinks h to draw the lateral edges of the plate f and the pad F securedthereto together so that the pad and plate assume a curvature formed ona shorter radius, the inner face of the plate f then engaging the outerfaces of the sectorshaped arms f throughout the length of the latter asis illustrated in Fig. 3. During these movements of the parts each ofthe links it moves relatively to its stud /L until the stud lies in theend of the slot in link it opposite to that in which it is shown in Fig.1 and further rocking movement of the shaft 7L and members if causeslinks h to act on studs ii in a direction to turn the levers g on theirpivots so as to move the sector-shaped arms f and plate f and pad Fsecured thereto inwardly of the drum so that plate f and pad F aredisposed concentric with the drum but spaced apart from the carrier E.These movements are made against the tension of the springs 9 and theparts are held in the positions above described against the tension ofthe springs g by the coaction of the stud j on the operating lever Jwith one of the openings in the gear I. The operator then turns thehandle i thus causing the gear 2' to rotate gear I and this gear carrieswith it the members g and all the parts secured thereto including themembers 7L2, the sectorshaped members f and the pad F. This rotation ofthe pad is continued until it is carried around to the open side of thedrum and roller Z is then turned about the shaft of roller Z to theoperative position in which it is shown in and in which it is in contactwith the pad F. The operator then turns the handle '5 in oppositedirections to cause the pad F to move back and forth so that the rollerZ runs back and forth over the entire outer surface of the pad F and indoing so the roller supplies Fig. 3

ink to the pad from the receptacle ll and roller 'hcu a sullicicntsupply of ink has been transferred to the pad l roller Z is moved to theinoperative position in which it is shown in Fig. l. The pad l is thenrotated by means of handle 11* back to the position in which itunderlies the carrier I and handle .I is turned back to its originalposition so as to permit springs y" to move scctonshapcd members f totheir origii'ial positions and to turn the 1ne111bers h in a directionto move the edges of the plate f and pad l outwardly into contact withthe overlying carrier I l' The lock of the drum is then released and theo 'icration of duplieating may be continutal .in the usual. man- 1101'.

Having described my invention what. I claim as new therein and desire tosecure by Letters Patent of the United States is:

1. 111 stencilduplicating apparatus, the combination of a drum havingmeans for securing a stcnci l-sheet thereto extending about a portion ofthe cylindrical surface thereof said drum being open on one side. aninking device within the drum, an inking-member outside the drum, andmeans for supporting said inking-member permitting movementthereofthrough said open side of the drum to supply ink to said inking device,substantially as set.- forth.

In stencil-duplicating apparatus, the con'ibination of a drum havingmeans for securing a stencil -sheet thereto extending about a portion ofthe cylindrical surface thereof, said drum being open on one side, aninking device within the drum, an inking-member outside the drum. meansfor supporting said inking-1nember permitting n'iovement thereof throughsaid open side of the drum and into contact with said inkingdevice, andmeans for moving said member and device While'in contact, substantiallyas setforth.

8. In stencil-duplicating apparatus, the coi'ubination of a drum havingmeans for supporting a stencil-sheet thereon extend ing about thecylindrical surface thereof, a securing device for the stencil-sheet, aninking device mounted Within the drum and adapted to rotate with thedrum, and means for moving said inking device relative to the drum andthe stencil-sheet thereon, sub stantially as set forth.

4. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, a securing device for the stencil-sheet,means for rotating the drum, an inking device mounted within the drumand rotatable with the drum, means for causing relative rotationalmovement of the drum and inking device, and a pressure-roller coactingwith the drum, substantially as set forth. I

5. ln stcncil-duplicating apparatus, the combination of a drum havingmeans for securing a stcncil-sl1ect thereon extending about a portion ofthe cylindrical surface thereof, said drum being open on one sidethereof, an inking device mounted within the drum,nu-:a11s for rotatingthe drum and inking device together while they are in. contact, andmeans for moving the inking device relatively to the drum to carry it.toward and away from said open side of the drum, substantially as setforth.

(3. ln stencil-duplicating apparatus, the combination of a drum havingmeans for securing a stencihsheet thereon extending about a portion ofthe cylindrical surface thereof, said drum being open on one sidethereof, an inking device mounted within the dru1n,1'1'1eans forrotating the drum and inking device together while they are in contact,means for moving the inking de vice relatively to the drum to carry ittoward and away from said open side of the drum, and an inking-membermounted outside said drum but adjacent thereto and adapted to transferink to said inking device, substantialh as set forth.

7. In stencil-duplicating ap )aratus, the combination of a drum havingmeans for securing a stencil-sheet thereon extending about; a portion ofthe cylindrical surface thereof, said drum being open on one sidethereof, an inking device mounted Within the drum, means for rotatingthe drum and inking device together while they are in contact, means formoving the inking device relatively to the drum to carry it toward andaway from said open side of the drum, an inking-member mounted outsidethe drum but adjacent thereto and adapted to contact with said inkingdevice, and means for moving said member and device while in contact totransfer ink from the member to said device, substantially as set forth.

8. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, and an inking device mounted within thedrum curved about the axis thereof engaging said supporting means over asubstantial area thereof, means for movii'ig said device from its normaloperative position and means for applying ink to said device,substantially as set forth.

9. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking device mounted Within the drumand curved about the axis thereof, and means for holding said deviceincontact with said supporting means over a substantial area thereof, saiddevice being adapted to be moved inwardly of the drum and away about thecylindrical surface thereof, an inking-device mounted Within the drumand curved about the axis thereof, means for moving the inking deviceinwardly of the drum, and means operated. from outside the drum forcausing relative rotation of the drum and inking device, substantiallyas setforth.

17. In stencil.-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, a inking device mounted Within the drum,curved about the axis thereof, and engaging said supporting means over asubstantial area thereof, means formoving the inking device inwardly ofthe drum and means for supplying ink to said inking device,substantially as set forth.

18. I11 stencil-dup]icating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking-device mounted within the drumand curved about the axis thereof, means for moving the inking deviceinwardly of the drum, means for causing relative rotation of the drumand inking device, an inking member mounted outside said drum, means forbringing said member and said device into contact, and means for movingthe member and device While in contact to transfer ink to the device,substantially as set forth.

19. In stsnail-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking device Within the drum, curvedabout the axis thereof and engaging said support ing means over asubstantial area thereof, and means for holding said device in position,said device being adapted to be moved inwardly of the drum and away fromsaid supporting means to permit of supplying ink to the drum,substantially as set forth.

20. In stencil-duplicating apparatus the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking-device Within the drum andengaging said supporting means over a substantial area thereof, aspring-metal plate for holding said device in position, and means forsecuring said plate in position upon the drum, substantially as setforth.

21. In stencil-duplicating apparatus, the combination of a drum, aforaminated sheet thereon, an ink-pad overlying said sheet, an ink-padWithin the drum curved about the axis thereof, means for holding saidlast-named pad in contact With the interior surface of said sheet, andmeans for moving said last-named pad out of contact with said sheet,substantially as set forth.

22. In stencil-duplicating apparatus, the combination of a drum, aforaminated sheet from said supporting means to permit of supplying inkto the drum, substantially as set forth.

10. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking-device mounted Within the drum,means for rotating the drum, and means for rotating said deviceindependently of said drum, substantially as set forth.

11. In stencil-duplicating apparatus, the combination of a rotatabledrum having means for supporting a stencil-sheet thereon extending aboutthe cylindrical surface. thereof, an inking-device mounted Within thedrum, means for moving said device to Ward and aWay from the drumindependently of the rotation of the drum, and means for causingrelative rotation of the drum and said device, substantially as setforth.

12. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface the -eof, an inking-device mounted Within the drumand engaging said device over a substantial area thereof, means forrotating the drum, and means for rotating said device independently ofthe drum, substantially as set forth.

13. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking-device mounted Within the drum,means for rotating said device independently of said drum, and means forsupplying ink to said inking-device, substantially as set forth.v

14. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking-device mounted Within the drumand engaging said supporting means over a substantial area thereof,means for rotating the drum, means for rotating said deviceindependently of the drum, and means for supplying ink to said inkingdevice, substantially as set forth.

15. In stencil-duplicating apparatus the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking device mounted Within the drum,curved about the axis thereof, and engaging said supporting means over asubstantial area thereof, and means for moving the inking-deviceinwardly of the drum, substantially as set forth.

16. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending thereon, anink-pad overlyii'ig said sheet, an ink-pad within the drum curved aboutthe axis tlmreof, means for holding said lastnanied pad in contact withthe interim.- sun face of said sheet and means for supplying ink to theouter side of said pad within the drum, substantially as set forth.

23. In stencil-duplicating appaatus, the combination of a drum, aforan'iinated sheet tl'iereon, an ink-pad overlying said sheet, anink-pad within the drum, means for holding said. last'named pad incontact with the interior surface of said sheet, means for moving thelast-named pad relatively to the drum, an inking'u'iemher, and means forbril'iging said inking-member and said lastnamed pad into coi'itact totransfer ink to the pad, substantially as set forth.

24:. In stencil-d1iplicating apparatus, the combination of a drum, meansfor supporting a stencil-sheet thereon extending about the surfacethereof, an inking-device within the drum, means for supporting saiddevice in contact with said supporting means and curved about the axisof the drum, means for moving said device to a position in which it isdisposed in a curve of shorter radius, and means for causing relativerotation of the drum and said device, substantially as set forth.

In stenoil-duplicating apparatus, the combination of a drum having meansfor supporting a stencil-sheet thereon extending about the cylindricalsurface thereof, an inking device mounted within the drum and engagingsaid means over a substantial area thereof, means for rotating the drumand said inking means together while in engagement, means for moving theinking device inwardly of the drain, and means for causing relativerotation of the drum and inking device, substantially as set forth.

26. In stencil-duplicating apparatus, the combination of a drum havingmeans for supporting a stencil-sheet thereon extending about thecylindrical surface thereof, an inking device mounted within the drumand engaging said means over a substantial area thereof, means forrotating the drum and said inking means together while in engagement,means for moving the inking device inwardly of the drum and meansoperative from outside the drum for causing relative rotation of thedrum and inking device, substantially set forth.

27. In stencil-dupli:ating al'ipaii'atus, the combination of a drumhaving means for securing a stencil-sheet thereon, extending about aportion of the cylindrical surface thereof, said drum being open on oneside thereof, an inking device mounted Within the drum, means forrotating the drum and inking device together, and means for rotatingsaid inking device relatively to the drum to carry it toward or awayfrom said open side of the drum, substantially as set forth.

28. In stencil-duplicating apparatus, the combination of a drum havingmeans for securing a stencil-sheet thereon, extending about a portion ofthe cylindrical surface thereof, said drum being open on one sidethereof, an inking device mounted within the drum, means for locking thedrum against movement, means for moving the inking device toward andaway from the drum, and means for supplying ink to the inking device,substantially as set forth.

29. In stencil duplicating apparatus, the combination of a rotatabledrum having a portion of its cylindrical portion closed and anotherportion open, an inking member mounted within the drum and rotatabletherewith, means for rotating the drum and inking member, means formoving said member toward and away from the open side of the drum, aninking member mounted outside the drum and means for bringing saidmembers into contact to supply ink to the member within the drum byprojecting one of them through said open )ortion of the drum,substantially as set orth.

This specification signed and witnessed this 7th day of May, 1908.

SAMUEL OWEN EDMONDS.

Witnesses:

D. G. EDMONDS, I. MoIn'rosn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 0! Patents, Washington, D. G.

